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I'm not perfect, but I'm trying every day to be better than I was yesterday.

"You can't win if you don't play."

The only way to learn mathematics is to do mathematics.

創(chuàng)造不是來自智力，而是來自源于內(nèi)在需要的游戲本能。創(chuàng)造性頭腦與它所鐘愛的對象玩耍。